This paper surveys 56 internationally renowned OR journals published in 1996–2005 with regard to authorship. Our findings
show that the USA was the country that contributed the largest amount, approximately one-third, of research results to OR
journals. Authors tend to publish papers in their home-country journals. Journal of the Operations Research Society of Japan has the highest author concentration, with more than 85% of the authors from Japan and European Journal of Operational Research, on the contrary, has the widest country spread of its authors. The entropy measure provides a whole picture of the share
of all countries, based on which the editorial policy of a journal can be adjusted.